Improvement in ink for printing and other purposes



UNITED STATES PATENT OFFICE.

LEWIS FRANCIS, OF NEW YORK, N. Y.

IMPROVEMENT IN INK FOR PRINTING AND OTHER PURPOSES.

Specification forming part of Letters Patent No. 102,243, dated April26, 1870.

To all whom it may concern:

Be it known that I, LEwTs FRANCIS, of the city, county, and State of NewYork, have invented, made, and applied to use a new and Improved Ink forPrinting and for other Purposes; and that the following is a full,clear, and exact description of the same.

The nature of my invention consists in combining glycerine, saccharinematter, and some gummy substance with coloring matter, to form an inkfor printing and other purposes, as more fully hereinafter set forth..

To enable those skilled in the art to make and use my invention, I willdescribe the same.

I take one pound of glycerine and add to the same two poimds of whitesugar and six ounces of gum-arabio, softened by some proper solventbefore being added; then add the coloring matter in sufficient quantityto give to the ink the desired color. I then heat the ingredients in asteam-kettle to dissolve the saccharine matter, and to unite it with thegum, glycerine, and coloring matter, after which it is ground, as in thecase of printinginks, in any suitable mill.

By the process just recited, the glycerine can be made to set or dry,giving the glycerine an advantage over the oils usually used in themanufacture of many kinds of printingink; and when the ink is employedin the printing of tinted grounds for checks or other work, it causes noinconvenience to the writer, as the writing-ink flows freely upon it,and cannot be removed without first destroying the tinted ground, andcanceling-marks placed upon printing done with this improved ink cannotbe removed without first destroying the printing.

When the ink is required of a more perma nent nature, some bituminous orresinous substance may be substituted,in whole orin part,for the gum,care being taken that the same shall be first dissolved by its propersolvent before being added in the manufacture of the ink.

I do not intend to confine myself to the proportions stated, as it willbe found necessary to vary the ingredients forming the ink to suit thevarious kinds of work to be accomplished, and the character of thecoloring matter used, and in some cases the gum or saccharine matter maybe omitted.

Having thus set forth my invention, what I claim as new is The use ofglycerine, saccharine matter, and gum, or their equivalents, whencombined with any suitable coloring matter, to form an ink for printingor other purposes, substantially as herein set forth. I

LEWIS FRANCIS. Witnesses:

A. SIDNEY DOANE, WM. HASTINGS.

